<template>
  <div>
    <!-- 面包屑导航 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>参数列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图 -->
    <el-card>
      <el-alert
        title="注意：只允许为第三级分类设置相关参数！"
        type="warning"
        show-icon
        :closable="false"
      >
      </el-alert>
      <!-- 选择商品分类区域 -->
      <el-row class="cat_opt">
        <el-col>
          <span>选择商品分类：</span>
          <el-cascader
            v-model="selectedCateKeys"
            :options="catelist"
            :props="cateProps"
            @change="handleChange"
          ></el-cascader>
        </el-col>
      </el-row>
      <!-- 页签 -->
      <el-tabs v-model="activeName" @tab-click="handleTabClick">
        <el-tab-pane label="动态参数" name="many">
          <el-button
            type="primary"
            size="mini"
            :disabled="isBtnDisadled"
            @click="addDialogVisible = true"
            >添加参数</el-button
          >
          <el-table :data="manyTableData" border stripe>
            <el-table-column type="expand">
              <template slot-scope="scope">
                <el-tag
                  closable
                  v-for="(item, i) in scope.row.attr_vals"
                  :key="i" @close="handleClose(i,scope.row)"
                  >{{ item }}</el-tag
                >
                <el-input
                  class="input-new-tag"
                  v-if="scope.row.inputVisible"
                  v-model="scope.row.inputValue"
                  ref="saveTagInput"
                  size="small"
                  @keyup.enter.native="handleInputConfirm(scope.row)"
                  @blur="handleInputConfirm(scope.row)"
                >
                </el-input>
                <el-button
                  v-else
                  class="button-new-tag"
                  size="small"
                  @click="showInput(scope.row)"
                  >+ New Tag</el-button
                >
              </template>
            </el-table-column>
            <el-table-column type="index"></el-table-column>
            <el-table-column
              label="参数名称"
              prop="attr_name"
            ></el-table-column>
            <el-table-column label="操作">
              <template slot-scope="scope">
                <el-button
                  type="primary"
                  icon="el-icon-edit"
                  size="mini"
                  @click="showEditDialog(scope.row.attr_id)"
                  >编辑</el-button
                >
                <el-button
                  type="danger"
                  icon="el-icon-delete"
                  size="mini"
                  @click="removeParams(scope.row.attr_id)"
                  >删除</el-button
                >
              </template>
            </el-table-column>
          </el-table>
        </el-tab-pane>
        <el-tab-pane label="静态属性" name="only">
          <el-button
            type="primary"
            size="mini"
            :disabled="isBtnDisadled"
            @click="addDialogVisible = true"
            >添加属性</el-button
          >
          <el-table :data="onlyTableData" border stripe>
            <el-table-column type="expand">
              <template slot-scope="scope">
                <el-tag
                  closable
                  v-for="(item, i) in scope.row.attr_vals"
                  :key="i" @close="handleClose(i,scope.row)"
                  >{{ item }}</el-tag
                >
                <el-input
                  class="input-new-tag"
                  v-if="scope.row.inputVisible"
                  v-model="scope.row.inputValue"
                  ref="saveTagInput"
                  size="small"
                  @keyup.enter.native="handleInputConfirm(scope.row)"
                  @blur="handleInputConfirm(scope.row)"
                >
                </el-input>
                <el-button
                  v-else
                  class="button-new-tag"
                  size="small"
                  @click="showInput(scope.row)"
                  >+ New Tag</el-button
                >
              </template>
            </el-table-column>
            <el-table-column type="index"></el-table-column>
            <el-table-column
              label="属性名称"
              prop="attr_name"
            ></el-table-column>
            <el-table-column label="操作">
              <template slot-scope="scope">
                <el-button
                  type="primary"
                  icon="el-icon-edit"
                  size="mini"
                  @click="showEditDialog(scope.row.attr_id)"
                  >编辑</el-button
                >
                <el-button
                  type="danger"
                  icon="el-icon-delete"
                  size="mini"
                  @click="removeParams(scope.row.attr_id)"
                  >删除</el-button
                >
              </template>
            </el-table-column>
          </el-table>
        </el-tab-pane>
      </el-tabs>
    </el-card>
    <!-- 添加参数对话框 -->
    <el-dialog
      :title="'添加' + titleText"
      :visible.sync="addDialogVisible"
      width="50%"
      @close="addDialogClosed"
    >
      <el-form
        :model="addForm"
        :rules="addFormRules"
        ref="addFormRef"
        label-width="100px"
      >
        <el-form-item :label="titleText" prop="attr_name">
          <el-input v-model="addForm.attr_name"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="addDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addParams">确 定</el-button>
      </span>
    </el-dialog>
    <!-- 编辑参数对话框 -->
    <el-dialog
      :title="'修改' + titleText"
      :visible.sync="editDialogVisible"
      width="50%"
      @close="editDialogClosed"
    >
      <el-form
        :model="editForm"
        :rules="editFormRules"
        ref="editFormRef"
        label-width="100px"
      >
        <el-form-item :label="titleText" prop="attr_name">
          <el-input v-model="editForm.attr_name"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="editDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="editParams">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data() {
    return {
      catelist: [],
      cateProps: {
        //级联选择框配置对象
        value: "cat_id",
        label: "cat_name",
        children: "children",
      },
      selectedCateKeys: [], //级联选择框双向绑定到的数组
      activeName: "many", //激活页签的名称
      manyTableData: [], //many动态数据
      onlyTableData: [], //only静态数据
      addDialogVisible: false, //添加对话框开关
      addForm: {
        attr_name: "",
      }, //添加参数表单数据对象
      addFormRules: {
        //输入参数的验证
        attr_name: [
          {
            required: true,
            message: "请输入参数名称！",
            trigger: "blur",
          },
        ],
      },
      editDialogVisible: false, //编辑框显隐
      editForm: {}, //编辑表单对象
      editFormRules: {
        //修改输入参数的规则验证
        attr_name: [
          {
            required: true,
            message: "请输入参数名称！",
            trigger: "blur",
          },
        ],
      },
    }
  },
  created() {
    this.getCateList();
  },
  computed: {
    isBtnDisadled() {
      //按钮需要禁用则返回否则false
      if (this.selectedCateKeys.length !== 3) {
        return true;
      }
      return false;
    },
    cateId() {
      //当前选中三级分类ID
      if (this.selectedCateKeys.length === 3) {
        return this.selectedCateKeys[2];
      }
      return null;
    },
    titleText() {
      //动静态计算标题文本
      if (this.activeName === "many") {
        return "动态参数";
      }
      return "静态属性";
    },
  },
  methods: {
    async getCateList() {
      //获取所有商品分类列表
      const { data: res } = await this.$http.get("categories");
      if (res.meta.status !== 200) {
        return this.$message.error("获取商品分类失败！");
      }
      this.catelist = res.data;
      console.log(this.catelist);
    },
    handleChange() {
      //级联框变化触发
      this.getParamsData();
    },
    handleTabClick() {
      //tab页签点击事件
      this.getParamsData();
      console.log(this.activeName);
    },
    async getParamsData() {
      //获取参数列表数据
      if (this.selectedCateKeys.length !== 3) {
        this.selectedCateKeys = [];
        this.manyTableData = []
        this.onlyTableData = []
        return;
      }
      console.log(this.selectedCateKeys);
      const { data: res } = await this.$http.get(
        `categories/${this.cateId}/attributes`,
        {
          params: { sel: this.activeName },
        }
      );
      if (res.meta.status !== 200) {
        return this.$message.error("获取参数列表失败！");
      }
      res.data.forEach(item => {
        item.attr_vals = item.attr_vals ? item.attr_vals.split(" ") : []
        //控制tag文本框
        item.inputVisible = false
        item.inputValue = ''
      });
      console.log(res.data);
      if (this.activeName === "many") {
        //获取到的数据区分many和only
        this.manyTableData = res.data;
      } else {
        this.onlyTableData = res.data;
      }
    },
    addDialogClosed() {
      //监听添加框关闭重置输入框
      this.$refs.addFormRef.resetFields();
    },
    addParams() {
      this.$refs.addFormRef.validate(async (vaild) => {
        if (!vaild) return;
        const { data: res } = await this.$http.post(
          `categories/${this.cateId}/attributes`,
          {
            attr_name: this.addForm.attr_name,
            attr_sel: this.activeName,
          }
        );
        if (res.meta.status !== 201) {
          return this.$message.error("添加参数失败！");
        }
        this.$message.success("添加参数成功！");
        this.addDialogVisible = false;
        this.getParamsData();
      });
    },
    async showEditDialog(attr_id) {
      //点击按钮编辑框
      const { data: res } = await this.$http.get(
        `categories/${this.cateId}/attributes/${attr_id}`,
        {
          params: { attr_sel: this.activeName },
        }
      );
      if (res.meta.status !== 200) {
        return this.$message.error("获取参数信息失败！");
      }
      this.editForm = res.data;
      this.editDialogVisible = true;
    },
    editDialogClosed() {
      //重置编辑表单
      this.$refs.editFormRef.resetFields();
    },
    editParams() {
      //点击按钮确认修改
      this.$refs.editFormRef.validate(async (vaild) => {
        if (!vaild) return;
        const { data: res } = await this.$http.put(
          `categories/${this.cateId}/attributes/${this.editForm.attr_id}`,
          {
            attr_name: this.editForm.attr_name,
            attr_sel: this.activeName,
          }
        );
        if (res.meta.status !== 200) {
          return this.$message.error("修改参数失败！");
        }
        this.$message.success("修改参数成功！");
        this.getParamsData();
        this.editDialogVisible = false;
      });
    },
    async removeParams(attr_id) {
      //根据id删除
      const confirmResult = await this.$confirm(
        "此操作将永久删除该参数, 是否继续?",
        "提示",
        {
          confirmButtonText: "确定",
          cancelButtonText: "取消",
          type: "warning",
        }
      ).catch((err) => err);
      if (confirmResult !== "confirm") {
        return this.$message.info("已取消删除！");
      }
      const { data: res } = await this.$http.delete(
        `categories/${this.cateId}/attributes/${attr_id}`
      );
      if (res.meta.status !== 200) {
        return this.$message.error("删除数据失败！");
      }
      this.$message.success("删除参数成功！");
      this.getParamsData();
    },
    async handleInputConfirm(row) {//tag失去焦点或按enter触发
    if(row.inputValue.trim().length === 0) {
      row.inputValue = ''
      row.inputVisible = false
      return
      }
      row.attr_vals.push(row.inputValue.trim())
      row.inputValue = ''
      row.inputVisible = false
      //发起请求保存标签
      this.saveAttrVals(row)
    },
    showInput(row) {//点击按钮展示tag输入框
      row.inputVisible = true
      this.$nextTick(_ => {
          this.$refs.saveTagInput.$refs.input.focus();
        });
    },
    async saveAttrVals(row) {
      const { data:res } = await this.$http.put(`categories/${this.cateId}/attributes/${row.attr_id}`,
        {
          attr_name: row.attr_name,
          attr_sel: row.attr_sel,
          attr_vals: row.attr_vals.join(' ')
        })
        if(res.meta.status !== 200) {
          return this.$message.error('修改参数项失败！')
        }
        this.$message.success('修改参数项成功！')
    },
    handleClose(i,row) {
      row.attr_vals.splice(i,1)
      this.saveAttrVals(row)
    },
  },
};
</script>

<style lang="less" scoped>
.cat_opt {
  margin: 15px 0;
}
.el-tag {
  margin: 10px;
}
.input-new-tag {
  width: 120px;
}
</style>